Saw-mill-carriage offset



(No Model.) 3 Sheets'Sheet 1.

J. H. VORSTMAN & E. F. NIEDEOKEN.

' SAW MILL CARRIAGE OFFSET.

No. 462,286. Patented Nov. 5, 1891.

fiw/enibws,

KWWW (No Model.) 3 Sheets-Sheet 2.

J. H. VORSTMAN & E. P. NIEDEGKEN.

SAW MILL CARRIAGE OFFSET.

No. 462,286. Patented NOV.3, 1891.

5 7- Z Aiimi l/ a 1 V a (No Model.) 3 Sheets-Sheet 3. J. H. VORSTMAN &E. P. NIEDEOKEN.

SAW MILL CARRIAGE OFFSET.

No. 462,286. Patented Nov. 3, 1891.

STATES PATENT OFFICE.

JOHN H. YORSTMAN AND EDlVARD F. NIEDECKEN, OF MILVAUKEE, VISCONSIN.

SAW-MlL'L-CARRIAGE OFFSET.

SPECIFICATION forming part of Letters Patent No. 462,286, dated November3, 1891.

Application filed May 9, 1891. Serial No. 892,166. (No model.)

To all whom it may concern.-

'Be it known that we, JOHN H. VoRsTMAN and EDWARD F. NIEDEGKEN, ofMilwaukee, in the county of Milwaukee and State of WVisconsin, haveinvented certain new and useful Improvements in Saw-Mill-CarriageOffsets; and we do hereby declare that the following is a full, clear,and exact description of the invention, which will enable others skilledin the art to which it pertains to make and use the same, referencebeing bad to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of this specification.

The object of our invention is to automatically shift the carriage-frametoward and from the saw-line when the movement of the carriage isreversed, so as to carry the log or timber out of contact with the sawin running the carriage back.

It consists of certain peculiarities in the construction and arrangementof the offsetting mechanism, and particularly of the actuatingmechanism, by which the offset is automatically operatcd,as hereinafterparticularly described, and pointed out in the claims.

In the accompanying drawings like letters designate the same parts inthe several figures.

Figure 1 is a plan view of a saw-mill carriage, to which our improvedoffsetting mechanism is applied. Fig. 2 is a side elevation, on anenlarged scale, looking rearwardly from the center of the carriage, ofthe actuating mechanism by which the offset is operated. Fig. 3 is anaxial section of the same. Fig. 4 is a partial elevation of the deviceviewed as seen in Fig. 2, and showing the pawl-carrier in verticalsection, the hub and vertical portion thereof being removed to discloseparts of mechanism covered thereby; and Fig. 5 is an axial sectionof'the offsetting device employed at the opposite end of the carriagefrom the offsetting and actuating devices. (Shown in Figs. 2 to 4.,inclusive.)

A represents the carriage-frame, B B the axles on which it is mounted, CC the carriage-wheels, and D I) the track-rails, all of the usual or anysuitable form and construction. The carriage-wheels C G on one side atleast of the carriage are preferably grooved or flanged, as shown, toengage with a V- shaped rail D, or a rail of suitable construction toguide the carriage and to restrain the truck-wheels and axles fromlateral movement with reference to the travel of the carriage. Thecarriage-frame A is allowed a limited sidewise or lateral movement uponits supporting-axles B B, sufficient to carry the log or timber awayfrom and clear of the saw in running the carriage back.

E E are brackets attached to the inside of the rear side rail of thecarriage-frame A, one at or near each end of the carriage directly overaxles B B. F F are arms loosely mounted upon the axles B B adjacent tosaid brackets, and provided at their outwardly-extending ends withshifting-rollers f f, which engage with laterally-inclined grooves e ein said brackets, said grooves being forined vertically in the arc of acircle concentric with the axles B B, 011 which said arms F F aremounted. These arms F F are formed below the axles with extensionsf f,which are connected by a rod N, so that the movement of one will producea like and simultaneous movement of the other.

Between the arm F and the adjacent bracket E a ratchet-wheel G is keyedupon the carriage-axle, and in the upper chambered portion of said arm,which serves as a pawl-carrier, are pivoted on pins f f extendingthrough the same, pawls H H, arranged to act in opposite directions withsaid ratchet-wheel. They are formed with arms h 71 projecting at theback side of the ratchet-wheel toward the axle on which it is mountedand arranged to engage with stops 6 6', (shown in Figs. a and 4,) formedwith or attached to bracket E in proper positions to throw said pawlsout of engagement with the ratchet-wheel at the desired points in themovement of the pawlcarrier.

Between the ratchet-wheel Gand the pawlcarrier F the friction-disk K isloosely mounted upon the h ub of said ratchet-wheel, as clearly shown inFigs. 2, 3, and 4. It is provided on one side with pins 7; 7.1, whichproject through arc-shaped slots f f in the pawl-carrier, and spiralsprings 71; it, placed around said pins in sockets formed for theirreception in the pawl-carrier to force the disk K snugly against theadjacent face of said ratchet-wheel G, or an interposed washer I, of anysuitable material, affording a suitable friction and wearing surface.The disk K is formed on the upper edge with projections 7& k which arearranged to engage with lugs 77/ h, projecting from the sides of pawls HH, and carry and hold the latter out of engagement with theratchet-wheel, as hereinafter explained. The pawl-carrying arm F is heldlaterally in place upon the axle B between and by the ratchet-wheel Gand the collar L, fixed upon said shaft, as shown in Fig. 3, and thecorresponding arm F at the opposite end of the carriage is held in placebetween and by a similar collar L and a collar M, fixed upon thecarriage-axle in a position corresponding with the position of theratchetwheel.

We do not wish to be understood as limiting ourselves to the employmentof the particular form of offsetting mechanism herein shown anddescribed, inasmuch as the actuating mechanism, by which the offset isshifted automatically when the movement of the carriage is reversed, maybe applied to various forms of offsetting devices.

Our improved device operates as follows: When the carriage is startedforward. in the direction indicated by the arrow in Fig. 1, theratchet-wheel G, engaging with the front pawl H, swings the pawlcarrierF, and, through the connecting-rod N, the corresponding arm F at theopposite end of the carriage to the left,-as shown in Fig. 2, therebymoving the shifting-rollers ff into the corresponding ends of theinclined slots e e in brackets E E and carrying the frame A for- V w ardtoward the saw-line, (indicated at 1 1,

Fig. 1.) As the friction-rollers approach the ends of the slots inbrackets E E,'as above mentioned, the arm h on the forward pawl Hengages with the adjacent stop e, as inclicated by dotted lines in Fig.2, and thereby throws said pawl out of engagement with saidratchet-wheel, arresting the further movement of the arms F F in thatdirection. The ratchet-wheel acting upon the friction-disk K causes itto turn in the same direction, carrying the rearward projection 70 underthe lug h on the rearward pawl H, and lifting and holding the same outof engagement with said ratchet-wheel, thereby preventing the noise andwear of its dragging over the teeth of said ratchet-wheel. reach theends of the slots f the further advance movement of said disk isarrested, while the rearward projection 7,5 is still in engagement withthe lug h of the rearward pawl. The ratchet-wheel now slips on the diskK or the interposed washer I, which has come to rest. he carriage-frameis held in working position toward the saw-line during its advance; butwhen its movement is reversed theratchet-wheel G turns the frictiondislLK in the opposite direction, first moving the rearward projection kout of engagement with the lug h on the rearward pawl H, al-

XVhen the pins 70- lowing the latter to drop into engagement with saidratchet-wheel. The ratchet-wheel now acting through the rearward pawlturns the arms F and F to the right, as shown in Figs. 2 and 4, untilthearm h on the rearward pawl strikes the rearward stop 6', thus throwingsaid pawl out of engagement with the ratchet-wheel. At the same time theforward projection 70 is carried underneath the lug h on the forwardpawl H, lifting it out of engagement with said ratchet-wheel, in themanner above explained. The pins It on the friction-disk, striking theopposite ends of the slots f in the arm F, arrest the further movementof said disk, while the forward projection 70 thereon is stillunderneath and in engagement with the lug on the forward pawl, and theratchet-wheel during the further return movement of the carriage slipson said friction-disk or the interposed washer I. As the carriagereturns to the starting-point and its movement is reversed the operationof the offsetting and offset-actuating mechanism hereinbefore explainedis repeated, and the carriage-frame A is shifted toward or from thesaw-line whenever and at whatever points in its travel the movement ofthe carriage is reversed.

Various changes may be made in the details of construction andarrangement of the parts, of which our improved offset is composedwithin theintended scope of our invention-as, for instance, a singledouble-acting pawl may be substituted for two separate pawls toaccomplish the same results, and the stops both for the pawl-carrier andfor the friction-disk may be variously constructed without affecting themode of operation of the offset. 1

We claim- 1. The combination, with the carriage-frame and its supportingwheels and axles, said frame being movable transversely to the di- IIOrection of its travel, of aratchet-wheel mounted uponone of said axles,a vibrating pawlcarrier provided with a pawl adapted to en gage withsaid ratchet-wheel, suitable offsetting mechanism connected with saidpawlcarrier and with the carriage-frame and adapted to shift the lattertransversely to the saw line, and a stop adapted to engage with saidpawl and throw the same out of engagement with the ratchet-wheel at thedesired point, substantially as and for the purposes set forth.

2. The combination, with the carriage wheels and axles and framelaterally movable with reference to the direction of its travel, of aratchet-wheel mounted upon'one of said axles, a pawl-carrier movable inthe direction of the travel of the carriage and provided with pawlsadapted to work with said ratchet-wheel, suitable offsetting mechanismconnected with said pawl-carrier and the carriage-frame and arranged toshift the latter transversely to the saw-line when the movement of thecarriage is reversed, and stops arranged to disengage the pawls fromsaid ratchet-wheel and to arrest the movement of the pawlcarrier at theproper points, substantially as and for the purposes set forth.

The combination, with the carriage-frame and its supporting wheels andaxles, said frame being movable laterally upon said axles, of aratchet-wheel mounted upon one of said axles,a pawl-carrierlooselymounted upon said axle and provided with pawls adapted to engage withand work in opposite directions with said ratchet-wheel, offsettingmechanism connected with said pawl-carrierand the carriageframe andadapted to automatically shift the latter toward and from the saw-linewhen the movement of the carriage is reversed, and stops arranged todisengage the actuatingpawl from said ratchet-wheel, and thereby arrestthe movement of the pawl-carrier at the desired points, substantially asand for the purposes set forth.

4. The combination,with the carriage-frame and its supporting wheels andaxles, said frame being movable transversely to the direction of itstravel, of a ratchet-wheel mounted upon one of said axles, a vibratingpawl-carrier loosely mounted upon said axle and provided with pawlsarranged to act in opposite directions with said ratchet-wl'ieel,springs holding said pawls normally in engagement with saidratchet-wheel, stops arranged to engage with projections on said pawlsand to throw the lat ter out of engagement with the ratchet-wheel andarrest the movement of the pawl-carrier in either direction at theproper points, and suitable offset ting mechanism connected with saidpawlcarrier and with the carriageframe, so as to automatically shift thelatter toward and from the saw-linewhen the movement of the carriage isreversed, substantially as and for the purposes set forth.

5. The combination,with the carriage-frame and its supporting wheels andaxles, said frame being movable transversely to the saw-line, of aratchet-wheel mounted upon one of said axles, a vibrating pawl-carrierprovided with a pawl adapted to work with said ratchetwheel and having aprojection engaging with an inclined groove or slot on thecarriageframe, and stops arranged to disengage said pawl from theratchet-wheel and to arrest the movement of the pawl-carrier in eitherdirection at the desired points, substantially as and for the purposesset forth.

(3. The con1bination,with the carriageframe and its supportinwheels andaxles, said frame being movable transversely to the direction of itstravel, of a ratchet-wheel mounted upon one of said axles, a vibratingpawl -carrier loosely mounted upon said axle and provided with one ormore pawls adapted to act in opposite directions with saidratchet-wheel, a friction-disk interposed between said pawlcarrier andratchet-wheel and having pro jections adapted to engage with said pawlsand hold the same out of engagement with the ratchet-wheel, stopsarranged to disengage the actuating-pawl from said ratchetwheel and toarrest the movement of the pawlcarrier in either direction at thedesired points, and offsetting mechanism connected with saidpawl-carrier and with the carriage-frame, so as to automatically shiftthe latter when the movement of the carriage is reversed, substantiallyas and for the purposes set forth.

7. The combination,withthe carriage-frame and its supporting wheelsandaxles, said frame being movable transversely to the direction of itstravel, of a ratchet-wheel mounted on one of the axles, a pawl-carrierprovided with one or more pawls adapted to work with said ratchet-wheelin opposite directions, a friction-disk movable a limited distanceindependently of the pawl-carrier and having projections adapted toengage and hold either pawl out of engagement with said ratchetwheel,and stops arranged to limit the movement of the pawl-carrier in eitherdirection at the proper points, substantially as and for the purposesset forth.

8. The eombinationavith the carriage-frame and its supporting wheels andaxles, said frame being movable transversely to the direction of itstravel,-of a ratchet-wheel mounted upon one of said axles, avibratingpawl-carrier loosely mounted upon said axle and provided with pawlsadapted to act in opposite directions with said ratchet-wheel, stopsarranged to disengage said pawls from said ratchet-wheel and to arrestthe movement of the pawl-carrier in either direction at the desiredpoints, a friction-disk interposed between said ratchet-wl1eel andpawl-carrier and provided with a pin projecting into a slot in saidpawl-carrier and with projections on its periphery adapted to engagewith said pawls and to move and hold the same out of engagement with theratchet-wheel, a spring interposed between said disk and the pawlcarrierand tending to hold said disk in contact with the ratchet-wheel, andsuitable off- IIO setting mechanism connected with said pawlcarrier andwith the carriage-frame, so as to shift the latter toward and from thesaw-line when the movement of the carriage is reversed, substantially asand for the purposes set forth.

9. The combination,with the carriage-frame and its supporting wheels andaxles, said frame being movable transversely to the direction of itstravel, of a ratchet-wheel mounted upon one of said axles, apawl-carrier loosely mounted upon said axle and provided with pawlsadapted to act in opposite directions with said ratchet-wheel, stopsarranged to disengage said pawls from said ratchet-wheel and to arrestthe movement of said pawl-carrier in either direction at the desiredpoints, and a vibrating arm mounted upon an axle at or near the oppositeend of the carriage and connected with said pawl-carrier, said arm andpawl-carrier having projections engaging with inclined slots or grooveson the carriage-frame, so as to shift the same toward or from thesaw-line when said arm and pawlcarrier are swung in either direction bythe ratchet-wheel, substantially as, and for the purposes set forth.

10. The combination, With the carriagefrarne and its supporting wheelsand axles,-

the idle pawl out of'engageinent with the ratchet-Wheel, and suitableoffsetting mechanism connected with said pawl-carrier and with thecarriage-frame, so as to shift the latter toward and from the saw-linewhen the movement of the carriage is reversed, substantially as and forthe purposes set forth.

In testimony that We claim the foregoing as our own We affix oursignatures in presence of two witnesses.

JNO. H. VORSTMAN. EDvV. F. NIEDEOKEN. Witnesses:

CHAS. L. Goss, E. G. ASMUS.

